Carbureter.



R. W GALLAGHER.

CARBURETER.

APPLICATION FILED AFR.2],19I2. RENEWED SEPT- h 1915. LIQSQYQQ. Patented Dec. 14, 1915. I 2 SHEETS-SHEET I.

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Z 7 1 ll fly il w '10 i2 an? WITNESSES HIWENTOH M' f 9 w #(W A M W ATTORNEY R. W; GALLAGHER.

CARBURETER.

APPLICATION FILED APR.2I.1912. RENEWED SEPT. I, 19I5.

Patented Dec. M, @915.

2 SHEETS SHEET 2 a N NH. N 7% F ED STATES PAENT FFTQE.

RICHARD W. GALLAGHER, OF NEW YORK, N. Y.', ASSIGNOB, BY MESNE ASSIGNMENTS, T0 1?. BIANCHI TOMPKINS, OF NEW YORK, N. Y.

CARBURETER.

Specification of Letters Patent.

Patented Dec. 14, 11915..

Application filed April 27, 1912, Serial No. 693,717. Renewed September 1, 1915. Serial No. 48,521-

part hereof.

This invention relates to'carbureters of the general character and construction of that shown in Letters Patent of the United States N 0. 976,258, dated November 22, 1910.

The object of the-invention is to improve both the constru'ction and the operation of carbureters of the type shown in said Letters Patent. 7

One object of the invention is to provide means whereby the suction by which the mixture is transferred from the mixing chamber to the engine shall be varied with the variation of the supply of gasolene and with the variation of the main air supply, while independent adjustment of the suction, of the gasolene supply and of the air supply is also permitted. In this way it becomes possible to adjust the suction, the gasolene supply and the air supply to the requirements of the engine with which the carbureter is employed and thereafter to vary the supply of the mixture, at the will of the operator,.according to the varying load which is put upon the engine.

Another object is to reduce the number of parts which enter into the construction of the carbureter and to make the structure as a whole more compact so-that the cost of manufacture is reduced and the liability to breakage and leakage is reduced.

Still another object is to enable the devices whereby the supply ,of gasolene is varied in proportion to the variation in the supply of air to be placed within the casing of the carbureter, so that such devices are protected from injury and from dust and dirt, while manual, adjustment of such devices canbe effected readily from the out-' side of the casing.

Further objects of the invention are tu described with reference to the accompanying drawings in which it is illustrated as embodied ina convenient and practical form and in which- Figure l is a view of the improved carbureter partly in side elevation and partly in longitudinal, central section. Fig. 2 is a top view of the same partly in horizontal section. Fig. 3 is a view in transverse section on the plane indicated by the line 33 of Fig. l, looking the direction of the arrows. Fig. 4; is a view in longitudinal central section, the adjusting stein being partly broken out to save space. Fig. 5 is a detail View of the float valve. Fig. 6 is a detail view of the sleeve-like air valve. Fig. 7 is a fragmentary view on an enlarged scale, partly in section and partly in elevaing its disposition with respect to the carburetingtsle re.

The main" body a'of the casing is generally cylindrical and forms or incloses the mixing chamber a. It has upon its upper .side, near one end, a dome (1 within whichthe float-tank or chamber and with an inner flange a to receive a carbureting sleeve hereinafter referred to, an opening a being providedwithin the flange a through which the primary mixture passes to the mixing chamber a.

The float-tank or chamber Z) fits against the flange a and is secured in place as will be described. It is formed at one side with a communicating float-valve chamber 6, in

which ismounted a float-valve c which comprises a sleeve 0 mounted to'slide vertically in a gland c and provided with a circumferential groove (1 and a valve stem 0* which is threaded in the sleeve 0, and is provided with a jam-nut c and with a suitable head 0 by which the inflow of gasolene from a suitable supply through an aperture 0 is controlled. The float d is annular, for

' tion, of the improved valve tube and. showa reason which will appear, and is hung, through ears d, from a forked lever d which is pivoted as at d, the other end 01 of the lever being also forked and engaging the circumferential groove 0 of the sleeve 0. The float and valve act in the usual manner to maintain the level of the gasolene in the tank I) at a predetermined height.

In the flange an is threaded a primary mixing valve sleeve 6'. The tank I) has in its bottom an opening 6 whch receives the sleeve 6 nugly, the bottom of the tank bearing against a flange e on the sleeve, while a nut c is threaded on the sleeve to press the bottom of the tank tightly against the flange 6. Below the nut e the sleeve is provided 'with openings 6 for the admission of the bottom or primary air which first forms a mixture with the gasolene vapor. The sleeve e is also provided interiorly with the valve tube 6 the interior of which communicates with the float-chamber I) through perforated lugs e. In the upper end of the valve tube e are formed two. openings e and e, the former having its mouth at a slightly higher level than the latter. In the lower end of the tube e is threaded the set needle valve e, which may be manipulated from the outside for the purpose. of regulating the flow of gasolene through the opening 0 With the other opening a 00- operates the needle valve hereinafter described.

The cylindrical mixing chamber is formed in its side with a triangular, variable air inlet a which is controlled'by a sleeve-like air valve f which is mounted to slide with a free lit in the chamber, is closed at one end, as at f, has a long slotted opening f in its underside to register with and leave unobstructed in any position the opening a in the bottom of the casing,-has in its upper side an opening f to register with and, it may be, also to regulate the passage a the opening f being extended rearwardly or to the right hand in Fig. 4:, as at f, for a'purvpose to be explained, and, it may be, has

in its side a narrow slot 7" which is entered by a guide pin f in the side of the casing a to prevent rotation of the sleeve. At its forward or right hand end the sleeve is provided with a transverse arm f into which is threaded the operating stem 9 which is guided in the head a and may be connected by any suitable means to the throttle lever. The stemvis threaded as at g and receives an adjusting stop g through.

which the inward movement of the stem and the openingmovement of the sleeve may be adjusted. A screw 9 threaded in the cap a, serves to limit the outward movement of the stem and the closing movement of the sleeve valve by contact with the arm 7.

A butterfly valve 71. is mounted in the passage a on a suitable stem 72. and to the lat ter is secured adjustably an arm 72?. The end of the arm, which is slipped upon a stem 71., is split and provided with a clamping screw 72, so that the arm can be secured upon the valve in any desired position of adjustment with respect to the valve h. A link i, pivotally engaged at one end with an arm in", is pivotally engaged at its other end with an arm 7.: which is threaded on. the stem g, a jam-nut 10' being provided for the purpose of securing it in position. The arm is, when disconnected from the link 2', may be moved to adjusted position on the stem, to provide an additional means of adjustment between the sleeve valve 7 and the butterfly valve h, besides the means of adjustmenfiprovided by the adjustable arm 71?.

The needle valve, which cooperates with the opening 0 of the valve 6 comprises a needle valve stem l which is threaded in a sleeve Z and is provided with a jam-nut l and with a suitable head P. The sleeve Z is itself threaded in a boss a of the easing a and is provided at its lower end, within the sleeve f, with an arm It. The arm issplit at the end which engages the sleevel and is provided with a clamping screw Z so that the arm can be secured in adjusted position upon the sleeve Z. The arm Z is also slotted as at Z to engage a pin i which is carried by a bracket f which projects inwardly from the wall of the sleeve 7.

r The operation of the carbureter will now be understood readily;

A suitable supply of gasolene being provided, the level of the gasolene in the float tank or reservoir 6 is maintained at a predetermined height by the operation of the float and float-valve in the usual manner. From the tank I) the gasolene passes to the gasolene tube 6 and flows out through the openings 0 and e at the top. The opening 6 is manually controlled by the set valve 6 so that, if desired, a constant flow may be maintained regardless of the condition of the aperture 6,- through which the principal flow takes place during the operation of the engine and in which the How is regulated, at the will of the operator, in accordance with the requirements of the work being done by the engine and in proper proportion to the inflow of air through the air inlet a. The initial air, which forms the first mixture with the gasolene vapor, enters through the openings 6 in the sleeve 6 and takes up the gasolene vapor from the end of the tube 6 the tube 6 being suitably shaped interiorly to direct the air. The mixture passes from the sleeve into the mixing chamber a, where additional air may or may not be supplied from the inlet a, as conditions may render desirable. With the flow of gasolene through the aperture e cut off altogether or reduced very much the air inlet a is closed or nearl closed and the necessary air is supplied through the openings 6 but when the flow of gasolene is increased by movement of the stem 9, sleeve f, sleeve nut Z and needle valve Z, the air inlet a is opened wider and eventually practically all of the air is admitted through the inlet a When the flow of gasolene is small and the quantity of air admitted is also. small the suction by which the mixture is withdrawn from the carbureter should also be small, and as the flow of gasolene is increased for heavier duty the suction should also be increased in proportion. Therefore the butterfly valve h is operatively connected, through the link 2', arm 7c and stem g, with the needle valve Z and the sleeve valve 7 and is opened or closed in accordance with the movement thereof.

It will be seen that independent adjustments of the slide valve, the needle valve and the butterfly valve can. be made to suit the requirements of the engine and that when once made the supply of the mixture to the engine, according to the conditions of operation, is under perfect control of the operator and that the supply of air, the supply of gasolene and the suction are then regulated each in proportion to the variation of the :others and that the proper relation is at no time disturbed. It will also beseen that the desired regulation is effected without the use of springs or weights or parts movable by the suction of the engine so that the action of the carbureter, when once adjusted, can be depended upon absolutely under all conditions and for long continued use. Obviously, also, the butterfly valve might be disconnected from the air valve, by simply disconnecting the link i and the connection made from the arm 71. to the engine governor so that the butterfly valve may be controlled by the governor.

It will be understood that various changes in details of construction and arrangement may be made and that some of the features of improvement are capable of use independently of others and in structures of other forms than th form shown and described herein.

I claim as my invention 1. In a carbureter, the combination of a mixing chamber, a gasolene nozzle supported below the same, aneedle valve to cooperate with said nozzle, an externally threaded sleeve mounted in thewall of the mixing chamber and supporting the needle valve, and a sliding air valve in said mixing chamber, said threaded sleeve having a slotted arm engaging the sliding air valve 2. In a carbureter, the combination of a mixing chamber having an opening for the admission of the primary mixture, an opening for the admission of air and an opening for communication with the engine, a gasolene nozzle, a needle valve to cooperate with said nozzle, means to regulate said needle valve, a suction controlling valve mounted in the opening which communicates with the engine, an independent sliding, air valve and operative connections between said sliding valve, said regulating means and said suction controlling means, whereby all of said parts are moved together.

3. In a carbureter, the combination of a. mixing chamber having an opening for the admission of the primary mixture, an opening forthe admission of air, an opening for communication with the engine, a gasolene nozzle, a' needle valve to cooperate w th said nozzle, independently adjustable means to regulate the needle valve, a sliding air valve, an operative connection between the sliding air valve and said means, a suction controlling valvein the opening which communicates with the engine, and independently adjustable operative connections between said sliding air valve and said suction controlling valve.

l. In a carbureter, the combination of a mixing chamber having an opening for the admission of the primary mixture, an opening for the admission of air and an opening for communication with theengine, a gasolene nozzle, a needle valve to cooperate with said nozzle, an externally threaded sleeve mounted in the wall of the mixing chamber to support said valve, and a sliding air valve in said chamber slotted for the ac commodation of the needle valve, said externally threaded sleeve having within the sliding air valve a slotted arm and said sliding air valve having interiorly a. lug to engage said slotted arm.

This specification signed and witnessed this 26th day of April, A. D. 1912.

RICHARD W. GALLAGHER.

Signed in the presence of- E. M. TAYLOR,

WORTHINGTON CAMPBELL.

Copies at this patent may be obtained for five cents' each, by addressing the Commissioner of Patents, Washington, D. C. 

